The problem of selection bias in explicit feedback, i.e. ratings, and implicit feedback, e.g. clicks, is thus well recognized and has been addressed extensively by the existing literature [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]}, [9]}, [10]}.
This can lead to the impression that learning from interactions is mainly a selection bias problem.
Nevertheless, our current work on the bandwagon effect will show that this is definitely not the case.
